Sinuous antennas are capable of producing ultra-wideband radiation with polarization diversity. This capability makes the sinuous antenna an attractive candidate for UWB polarimetric radar applications. Additionally, the ability of the sinuous antenna to be implemented as a planar structure makes it a good fit for close-in sensing applications such as ground-penetrating radar (GPR). In this work, each arm of a four-port sinuous antenna is operated independently to achieve a quasi-monostatic antenna system capable of polarimetry while separating transmit and receive channels—which is often desirable in GPR systems. The quasi-monostatic configuration of the sinuous antenna reduces system size as well as prevents extreme bistatic angles, which may significantly reduce sensitivity when attempting to detect near-surface targets. A prototype four-port sinuous antenna is fabricated and integrated into a GPR testbed. The polarimetric data obtained with the antenna is then used to distinguish between buried target symmetries.

中文翻译：

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接近表面极化探地雷达的不平衡弯曲天线

弯曲天线能够产生具有极化分集的超宽带辐射。这种能力使弯曲天线成为UWB极化雷达应用的有吸引力的候选者。此外，弯曲天线可实现为平面结构的能力使其非常适合于近距离感测应用，例如探地雷达（GPR）。在这项工作中，四端口弯曲天线的每个臂都独立运行，以实现能够极化的准单静态天线系统，同时分离发射和接收通道，这在GPR系统中通常是需要的。弯曲天线的准单静态配置可减小系统尺寸并防止极端的双静态角度，这可能会大大降低尝试检测近地表面目标时的灵敏度。制造了原型四端口弯曲天线，并将其集成到GPR测试台中。然后，将通过天线获得的极化数据用于区分掩埋的目标对称性。